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Port 1522 (ricardo-lm)

IANA assigns port 1522 to ricardo-lm: Ricardo North America License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ricardo-lm TCP Ricardo North America License Manager Mike Flemming -
ricardo-lm UDP Ricardo North America License Manager Mike Flemming -

Check what is listening on port 1522

Linux: is anything listening on TCP 1522?
sudo ss -tlnp 'sport = :1522'
Linux: UDP 1522
sudo ss -ulnp 'sport = :1522'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1522
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1522 '
Windows (Command Prompt)
netstat -ano | findstr :1522
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1522 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1522
From Windows
Test-NetConnection HOST -Port 1522
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1522

Block port 1522 in the firewall

ufw
sudo ufw deny 1522/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1522 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1522 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1522' -Direction Inbound -Protocol TCP -LocalPort 1522 -Action Block
ufw
sudo ufw deny 1522/udp
iptables
sudo iptables -A INPUT -p udp --dport 1522 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1522 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1522' -Direction Inbound -Protocol UDP -LocalPort 1522 -Action Block

Related ports

6148ricardo-lm1520atm-zip-office1521Oracle Database listener1523cichild-lm1524ingreslock

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.